big optimization round

lynglib/src/wasmJsMain/kotlin/net/sergeych/lyng/ArgBuilderWasm.kt

@@ -0,0 +1,20 @@
+package net.sergeych.lyng
+
+import net.sergeych.lyng.obj.Obj
+
+actual object ArgBuilderProvider {
+    actual fun acquire(): ArgsBuilder = WasmArgsBuilder()
+}
+
+private class WasmArgsBuilder : ArgsBuilder {
+    private var buf: MutableList<Obj> = ArrayList()
+
+    override fun reset(expectedSize: Int) {
+        buf = ArrayList(expectedSize.coerceAtLeast(0))
+    }
+
+    override fun add(v: Obj) { buf.add(v) }
+    override fun addAll(vs: List<Obj>) { if (vs.isNotEmpty()) buf.addAll(vs) }
+    override fun build(tailBlockMode: Boolean): Arguments = Arguments(buf.toList(), tailBlockMode)
+    override fun release() { /* no-op */ }
+}

lynglib/src/wasmJsMain/kotlin/net/sergeych/lyng/PerfDefaults.wasmJs.kt

@@ -0,0 +1,19 @@
+package net.sergeych.lyng
+
+actual object PerfDefaults {
+    actual val LOCAL_SLOT_PIC: Boolean = true
+    actual val EMIT_FAST_LOCAL_REFS: Boolean = true
+
+    actual val ARG_BUILDER: Boolean = true
+    actual val SKIP_ARGS_ON_NULL_RECEIVER: Boolean = true
+    actual val SCOPE_POOL: Boolean = false
+
+    actual val FIELD_PIC: Boolean = true
+    actual val METHOD_PIC: Boolean = true
+
+    actual val PIC_DEBUG_COUNTERS: Boolean = false
+
+    actual val PRIMITIVE_FASTOPS: Boolean = true
+    // Conservative default for non-JVM until validated
+    actual val RVAL_FASTPATH: Boolean = false
+}